Regulator for gas-burning heaters for liquids



Feb. 24, 194s. G, H, KRISOR 2,436,651

REGULATOR FOR GAS BURNING HEATERS FOR LIQUIDS Filed Jan. 22, 1946 2 Sheets-Sheet l I u 111i/ tor Fceb, 24, 194% G. H. @misma Zm REGULATORFOR GAS BURNING HEATERS FOR LIQUIDS Filed Jan. 22, `1946 2 sheetssheet 2 I nrw/tor 'mf Wi? Patented Feb. 24, 1948 REGUIATOK FOR GAS -BURNING HEATERS FOR LIQUIDS" Gilberti H2Y Krisen ,}"lvaru-1tou,\.111.;v assigner-ofy onehalf to: DavidiA'. Kuhlin;l Chicago, Ill.-

Application January 22, 1946,' ,Seral'Na 642,696

, 1 This invention` relates to new!y and useful improverx'lentsA andistructura'l ref'nementse in' reg-ulatorsfforvgasfburning heaters, and'ialthougnthe general iscope ofthisf device mayfbe-expandedito heatersl off vari'ousftypes andi applications, the

presentv invention applies particularly toAK gas burning 'heater-sf such asare vused for -the processing of acrylic', softeningzof"hydroecolloid; compounds, etcr, inthedental profession;

The principal obiiectofthe invention istoiprovide a device of the'character -herein described, by means /ofiw'hich'the liquid beingilieatedwill be automatically: and 'accurately maintained at av predetermined" degree of 1 temperature.

A further objectofthe invention is to provide a regulator which may be simply andi convene iently attached to the receptacle in whichthe liquid is being heated and which-may beuniversally appliedtoall .typesof gas burningde vices.

Another object of theinvention is.to. provideV a. regulator which Y is of simple Y.construction 1 and which, when once adjusted,` will operate -for,con siderable periods of time without attention.,

An additional object oftheinventionis ,toprovide a regulator` which may be..readily=disassemi bled for purposes of cleaning, inspection, or repair.

With theabovemcreimportaut .objects in View, and such other objects as may become apparent as this specication proceeds, the invention. consists essentially of the, arrangement' and construction Y of parts as illustrated in. the e, accompanying drawings, in which:

Figure 1v is.. a. side. elevation, of.' the. invention, showing the. same connectedrto va heaterA and .in position rin the liquid which is being heated.

Figure 2 is` a. central, ,cross-,sectional view,` illustrating the ,regulatonper se.

Figure` is a.....crossesectional,,viewtakenjn the' Figurant-is aacrossi-.sectional ,viewataken-,in the Figure .l 5 is av perspective View r illustrating.' a.

Referringtznowtheii accompanyingy drawings-in detail, the;4 inventimnV consists :1 of an 1 elongated,

2': verticallyy disposed'casing I, provided at the lower end thereof with a flanged cover 2 and closed at the `upper endby means of a at plate 3. The latter` is provided withv a downturned lug 4, whereby'itis-securedto-the'sidewall of the casing I by'means'of a suitable bolt 5;

Positionedin thevl lower end of vthe casing upon the cover2'isathermostat 6, the upper end of whichl isv provided with an opstanding, screw threadedstud Av pair of divergent extension arms- 811 are" securedat their lower ends to the stud Vbyrmeansofak pair of lock nuts 9, the arms extending upwardly and outwardly as is bestiillustrated inrthel accompanying Figure 2.

hvA circularl pressure plate l0 is secured to the upper extremities of the arms 8; the purpose of this' piatefb'einghereinafter more fully described.

The-lower end'of'the casing I is adapted for insertion'irito the `liquid'fll which is being heated `r in a receptacle` I2, andthe casing is provided with*v acplurality of circulating apertures or openings ISYin-order'that' the thermostat 6 may be actually' immersed inv the liquid.

Positioned: in the casing I medially of its length', isfa bearingl plate I4 provided With a central aperture inV whichv a Valve'body I5 is freely slidable: The'laterA is of a substantially cylindricalicongurationiand is formed with a cylindricalcli-amber I6; as is best illustrated in the accompanying Figure 21 Theupper` end` of the'body I5 lis formed with ascrew` threaded shank ITwhich is freely slidableina bearing block I8, secured to the underside of the plate 3. The shank protrudes'through :the upperendof the casing land engages av nut I9,- the latter'heing imbedded in one end of an adjustingknob-20;` This knob is also provided with a blind, axially extending bore 2| which is adapted' to" receive the projecting end of. the shankvv I1;

A compressiowspringg isv interposed between theupper endofthebo'dy I5 and theunderside of-"itl'iefplat,'whereby'theknob 2U and the asso'ciatednut'V` IS'will` bourget-lagainst the upper v' end ofthe Vcasing-I i Muntedupon the-body I5 and communicating with the chamber I6 'medially the length thereof, isa gasfinlet-duct 23 and a gas outlet duct 24 enters the chamber-adjacent to its upper end.

These ducts"protrudethrough a slot 25l formed in the side wallo the casing I and a o5/pass 26 connects the two ducts on the outside of the casing.; as will be clearly-apparent from the accompanying-drawings. This-by-pass is provided "witht-ani-ad-justing-screw22-1, the pointed shank of which is engageable with a seat 28 formed in the by-pass wall.

Positioned in the lower end of the chamber I6 is a slidable piston 29, the same being provided with a piston stem 30. The lower end of the body I is externally threaded as indicated by the reference numeral 3I to receive an internally threaded cap 32. The latter is formed with a central aperture or passage 33 through which the stem 30 may freely pass and a packing gland 34 is positioned between the piston and the cap to prevent leakagearound the stem. v

Adjacent the lower extremity of the stem '3p is a at washer 35 which is retained thereon by means of a transversely extending pin 36 andl 4 Wise direction) until the spring 22 is fully extended and the knob turns freely. During this operation the piston 29 will remain stationary and the housing I5 Will travel downwardly against the resiliency of the spring 31 until the piston completely covers the inlet duct 23.

The petcock 42 should now be opened and the 'burner of the heater 40 lighted, whereupon the screw 21 is adjusted so that the gas will flow from the duct 23 and through the by-pass 26 and the duct 24 to the burner at a minimum rate such as is necessary in order to maintain the burner t in operation.

a compression spring 31 is interposed between the cap 32 and the washer 35 to urge the lower end of the stem 30 against the aforementioned pressure plate I 0.

Projecting outwardly from the side of casing LI is a mounting platform 38, provided with a pair of apertures 39,

The receptacle I2 is usually positioned upon the burner of the heater 40, the latter being connected by means of a suitable tube 4I to the aforementioned outlet duct 24 and a suitable valve or petcock 42 being provided to control generally the operation of the heater. A further tube 43 connects the inlet duct 23 with a source of gas supply and a housing or an enclosure 44 is removably snapped into position on the platform 38 to inclcse the ducts and portions of the tubes associated therewith.

The enclosure 44 is provided with a suitable 'opening 45 through which the tubes 4I and 43 may freely pass.

The regulator may be mounted directly upon -the receptacle I2 by means of a bracket designated by the general reference numeral 46 which is illustrated in the accompanying Figure 5.l This bracket consists of a pair of parallel prongs 41,

angulated at the lower ends thereof to form the portions 48, which in turn, are bent downwardly to form a, resilient clamp 49, congurated essentially as shown in the accompanying drawings. The portions 48 are reinforced Aby a transversely `extending web 50 and the entire bracket may be formed integrally from one piece of wire rod. The upper ends of the prongs 41 are removably insertable into the aforementioned aperture 39 in l.the platform 38, and the resilient clamp 49 is ladapted to cooperate with the casing l in clamping the regulator to the side wall of the receptacle I2.

Alternatively, the regulator maybe attached to a suitable work bench by substituting a bracket 5I for the bracket 46, the modified bracket being illustrated in the accompanying Figure 6. The bracket 5I consists of a pair o f prongs 52, similar to the aforementioned prongs 41 and are removably insertable into the apertures 39. The prongs 52 are angulated at the lower ends thereof to form the portions 53, and a mounting plate -54 is Vsecured to these portions as will be clearly apparent from the accompanying drawings. This vplate is provided with a pair of suitable apertures 55 whereby the bracket and the regulator associated therewith may be attached to a work bench by means of suitable bolts.

Having thus described the construction of the invention, its method of operation will now be presented.

Assuming the regulator to be attached and connected as illustrated in the accompanying Figure 1, the knob 20 is rotated (inthe anti-clock- The knob 20 should now be turned (in the clockwise direction) to raise the body I5 and the inlet duct 23 associated therewith above the level of the piston 29. 'I'he gas will now pass from the duct 23 and through the chamber I6 and the duct 24 to the burner, and the latter will burn fully.

The temperature of the liquid II should now bev checked by means of a conventional thermometer, and the rise in temperature of the liquid will be accompanied by a corresponding expansion of the thermostat 6. This expansion will be transmitted through the extension arms 8 and the stem 30 to'the piston 29 and the latter will be forced upwardly until a certain degree of temperature has been reached and the piston has again covered the inlet duct 23.

At this point, the flame in the burner will vagain be reduced to the minimum rate of flow as tively. Y

' After the ame in the burner has been operating at a minimum, the temperature of the liquid will decrease and simultaneously, the thermostat 6 will contract until the piston 29 again uncovers the inlet duct 23. Thereupon, the cycle of operation as above set forth will be repeated and it will be observed that once the adjustment of the knob 29 is made to correspond toa predetermined degree of temperature, the regulator will continue to function automatically and accurately to maintain the temperature of the liquid within very close limits of variation with respect to that degree of temperature.

While in the foregoing there has been shown and described the preferred embodiment of this invention it is to be understood that minor changes in the details of construction, combination and arrangement of parts may be resorted to without departing from the spirit and scope of the invention as claimed.

What I claim as my invention is:

1. A regulator for gas burning heaters for liquids, comprising, in combination, an elongated,

vertically disposed casing closed at the ends "thereof, a thermostat in the lower end of said V`lecting through said aperture, a rotatable adjusting knob, an internally threaded portion on said knob, said internally threaded portion engaging the projecting end of said shank, a compression spring between said body and the upper end of said casing, a cylindrical chamber in said body, a gas inlet duct medially the length of said chamber, a gas outlet duct adjacent the upper end of said chamber and in communication with said heater, an adjustable by-pass connecting said ducts, a piston slidable in the lower end oi said chamber, a stem connected to said piston and protruding through the lower end of said body, and resilient means for urging the lower end of said stern against said pressure plate.

2. The device as defined in claim 1 in which said means comprises, in combination, a cap formed with a central aperture at the lower end of said body, said stem projecting through said aperture, a washer positioned on said stem, and a compression spring between said washer and said cap.

3. In association with the device as dei-ined in claim l, means for attaching said casing to a receptacle containing said liquid.

4. The device as dened in claim 1 together with a bracket provided on said casing and formed with a pair of apertures, and a wire rod angulated to provide a resilient clamp and a pair of prongs, said prongs being removably receivable in said apertures and said clamp being engageable with said casing.

GILBERT H. KRISOR.

REFERENCES CITED The following references are of record in the le of this patent:

UNITED STATES PATENTS Number Name Date 575,042 Rowe Jan. 12, 1897 856,815 Seward June 11, 1907 926,194 Junkers June 29, 1909 FOREIGN PATENTS Number Country Date 69,447 Switzerland July 6, 1914 

